Sign up for Spotify with or without Facebook?

Spotify has just launched where I live, and I'm going to give a try especially since it's so popular and seems to be cheaper than some of the alternatives I've been using. I'll be using it on Apple devices most of the time.

My question for current users is, though: should I sign up for a new account with my Facebook account o just use my email? Is it something I can change later if I change my mind? (I've quickly skimmed through the support section and didn't find anything)

Also, any other tips for a new Spotify user?